8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
608 B
608 B
takeRightWhile
Removes elements from the end of an array until the passed function returns true. Returns the removed elements.
Loop through the array, using a for...of loop over Array.prototype.keys() until the returned value from the function is true.
Return the removed elements, using Array.prototype.reverse() and Array.prototype.slice().
const takeRightWhile = (arr, func) => {
for (let i of arr.reverse().keys())
if (func(arr[i])) return arr.reverse().slice(arr.length - i, arr.length);
return arr;
};
takeRightWhile([1, 2, 3, 4], n => n < 3); // [3, 4]